Railroad car coupler assembly knuckle pin



FIG. 1 is a first front perspective view of a railroad car coupler assembly knuckle pin showing my new design.

FIG. 2 is a second front perspective view of a railroad car coupler assembly knuckle of FIG. 1.

FIG. 3 is a front side view of the railroad car coupler assembly knuckle pin of FIG. 1.

FIG. 4 is a rear side view of the railroad car coupler assembly knuckle pin of FIG. 1.

FIG. 5 is a right side view of the railroad car coupler assembly knuckle pin of FIG. 1.

FIG. 6 is a left side view of the railroad car coupler assembly knuckle pin of FIG. 1.

FIG. 7 is a top view of the railroad car coupler assembly knuckle pin of FIG. 1; and,

FIG. 8 is a bottom view of the railroad car coupler assembly knuckle pin of FIG. 1.

The broken lines shown in the views depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a railroad car coupler assembly knuckle pin, as shown and described. 